Simplemonitor

* REMOVED SUPPORT FOR Python 2.6

+ Add Slack alerter
+ Add Command monitor
+ Add pkg audit monitor
+ Add SSL client auth
+ Add Amazon SES alerter
+ Add a sample upstart script
+ Add support for Pushover
+ Add support for alerters to repeat
+ Support username/password and SSL support for SMTP
* Use subprocess everywhere
* Honour SMTP port in configuration
* Honour gap configuration option
* Use HTTPS for BulkSMS API
* Date format for logfile is configurable
* Use UTC everywhere for times; should fix monitors which have been down -1 hours
* Teach the host (ping) monitor to use command line options better on
different operating systems
* Verify dependencies exist
* Stop alerters from firing success notifications out-of-hours

* Added DNS monitor
* Added Execute logger

* Fixed a problem where success alerts were always sent
* Many other small fixes

+ Added remote monitor/central reporting support
+ Added support for monitor defaults
+ Added HTML logger type to generate a status webpage
+ Added syslog alerter

+ Added -p option to write a pidfile
+ Added support for a HUP signal to close/reopen logfiles

* Refactored monitor/logger/alerter registration code
These objects are now more self-loading and just need to be
passed a dict of their config options.
* Changed to using packages for monitors, loggers and alerters.
* Fixed bug where initial failure time was always the most recent
failure time.
* Fixed a bug with the DiskSpace monitor which meant the free space
on non-Windows platforms was incorrectly calculated.
* Changed the intention of the DiskSpace monitior on non-Windows
platforms to measure the non-superuser free space.
* Fixed a bug which could mean the main loop ignored the interval
if an error occurred during tests.
* Better support for the dry_run setting on alerters
* BulkSMS sender now limits messages to 160 chars (otherwise BulkSMS
rejects them).
* Formatted times in alerts to not include microseconds

+ Monitors now know their own name
+ Alerters now have configurable time ranges for operation.
+ Alerters now have days of operation.
+ Alerters can hold alerts that occur out-of-hours and update you
if the monitor is still failed when they become in-hours.
+ Email alerts for failure now include downtime (which will be 0 for
an alert that fires immediately, but may be useful for alerters with
a limit).